Mitsubishi Electric PUHZ-RP125VHA2 User Manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. REFERENCE MANUAL··································2
2. SAFETY PRECAUTION··································3
3. FEATURES ·····················································7
4. SPECIFICATIONS···········································8
5. DATA ·····························································10
6. OUTLINES AND DIMENSIONS····················15
7. WIRING DIAGRAM·······································18
8. WIRING SPECIFICATIONS ··························21
9. REFRIGERANT SYSTEM DIAGRAM ··············26
10. TROUBLESHOOTING ··································29
11. FUNCTION SETTING····································86
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ············92
13. EASY MAINTENANCE FUNCTION············102
14. DISASSEMBLY PROCEDURE ···················107
15. PARTS LIST ················································129
16. RoHS PARTS LIST ·····································140
No.OC374
REVISED EDITION-A
R410A
July 2006
Outdoor unit
[model names]
PUHZ-RP35VHA2
PUHZ-RP50VHA2
PUHZ-RP60VHA2
PUHZ-RP71VHA2
PUHZ-RP100VHA2
PUHZ-RP125VHA2
PUHZ-RP140VHA2
PUHZ-RP100YHA2
PUHZ-RP125YHA2
PUHZ-RP140YHA2
[Service Ref.]
PUHZ-RP35VHA2
PUHZ-RP50VHA2
PUHZ-RP60VHA2
PUHZ-RP71VHA2
PUHZ-RP100VHA2
PUHZ-RP125VHA2
PUHZ-RP140VHA2
PUHZ-RP100YHA2
PUHZ-RP125YHA2
PUHZ-RP140YHA2
PUHZ-RP60VHA2
PUHZ-RP71VHA2
NOTE:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products have
<G> mark on the spec name
plate.
• For servicing of RoHS compli-
ant products, refer to the RoHS
PARTS LIST.
Revision:
• RoHS PARTS LIST is added.
• Some descriptions have been
modified.
• Please void OC374.
OC374A--1.qxp 06.7.26 5:07 PM Page 1

Mitsubishi Electric PUHZ-RP125VHA2 Specifications

General

Cooling Capacity	12.5 kW
Heating Capacity	14.0 kW
Refrigerant	R410A
Energy Efficiency Class	A++
Type	Split System
Noise Level (Outdoor)	52 dB

Summary

Reference Manual

Indoor Unit Service Manual

Details regarding service manuals for indoor units, including service references and manual numbers.

Technical Data Book

Reference to the technical data book, Manual No. OCS05.

Safety Precautions

Cautions Related to New Refrigerant

Specific safety guidelines and precautions for handling new refrigerants like R410A.

Features

Specifications

Data

Refilling Refrigerant Charge (R410A : kg)

Table detailing refrigerant charge (kg) for various models based on piping length.

Compressor Technical Data

Technical data for compressors, including model, winding resistance, and U-V, U-W, W-V values.

Noise Criterion Curves

Graphs showing octave band sound pressure levels for different models and modes.

Standard Operation Data

Table of standard operation data for various models, including capacity, input, and refrigerant circuit details.

Outlines and Dimensions

Foundation Bolts

Instructions for securing the unit with foundation bolts, including recommended hardware.

Piping-Wiring Direction

Information on the direction for piping and wiring connections.

Attaching the Conduit

Guidance on attaching the conduit, including necessary metal plates and screw holes.

Wiring Diagram

Wiring Specifications

Field Electrical Wiring (Power Wiring Specifications)

Specifications for field electrical wiring, including power supply, wire sizes, and circuit ratings.

Separate Indoor Unit/ Outdoor Unit Power Supplies

Details on power supply patterns for separate indoor and outdoor units, including wiring diagrams.

Indoor – Outdoor Connecting Cable

Specifications for indoor-outdoor connecting cables, including maximum lengths and wire sizes.

M-NET Wiring Method

Guidelines for M-NET wiring, including installation points, cable types, and grounding methods.

Refrigerant System Diagram

Troubleshooting

Troubleshooting

Summary of error code displays and actions for service, based on phenomenon recurrence.

Check Point Under Test Run

Points to check before performing a test run, including wiring and power supply.

How to Precede "Self-Diagnosis"

Procedures for initiating self-diagnosis for operation issues and maintenance.

Self-Diagnosis Action Table

Table detailing error codes, meanings, cases, and judgment/action for detected abnormalities.

Troubleshooting by Inferior Phenomena

Guidance on diagnosing and resolving issues based on observed phenomena and factors.

How to Check the Parts

Methods for checking the resistance of various parts like motors, valves, and thermistors.

How to Check the Components

Charts and explanations for checking thermistor resistance values at different temperatures.

Emergency Operation

Procedure and cautions for operating the unit in emergency mode when errors occur.

Test Point Diagram

Diagrams illustrating test points on outdoor controller circuit boards for troubleshooting.

Function of Switches, Connectors and Jumpers

Details on the functions of various switches, connectors, and jumpers on the control boards.

Function Setting

Unit Function Setting by the Remote Controller

Setting unit functions using the remote controller, including mode and setting selections.

Selecting Functions Using the Wireless Remote Controller (Type C)

Procedure for selecting functions using a wireless remote controller.

Function Selection of Remote Controller

Description of remote controller functions available for setting, such as language and mode selection.

Monitoring the Operation Data by the Remote Controller

How to "Monitor the Operation Data"

Steps to access and view operation data, including maintenance mode and request codes.

Request Code List

List of request codes for monitoring operation data, including their descriptions and units.

Detail Contents in Request Code

Detailed explanations for specific request codes related to operation states and control.

Easy Maintenance Function

Maintenance Mode Operation Method

Procedure for activating and using the maintenance mode for unit inspection and data checking.

Guide for Operation Condition

Guidance on checking operation conditions using temperature differences and graphs.

Initial Settings for Refrigerant Leakage Detection Function

Steps to set initial conditions for refrigerant leakage detection, including learning and judgment.

Disassembly Procedure

Removing the top panel, service panel, front panel and back panel

Step-by-step instructions for removing the outer panels of the unit.

Removing the fan motor

Procedure for safely removing the fan motor, including propeller and connector disconnection.

Removing the electrical parts box

Instructions for disconnecting wires and removing the electrical parts box.

Removing the thermistor <Outdoor 2-phase pipe> (TH6) and thermistor <Outdoor pipe> (TH3) (TH33)

Procedure for removing outdoor thermistors, noting combined units.

Removing the thermistor <Outdoor> (TH7)

Steps for removing the outdoor thermistor, noting combined units with TH6.

Removing the thermistor <Outdoor pipe> (TH3) (TH33) and thermistor <Discharge> (TH4)

Procedure for removing outdoor pipe and discharge thermistors.

Removing the solenoid valve coil <Four-way valve> (21S4), and linear expansion valve coil (LEV(A), LEV(B)) and solenoid valve coil <Bypass valve> (SV)

Instructions for removing solenoid valve coils and linear expansion valve coils.

Removing the four-way valve

Procedure for removing the four-way valve, including refrigerant collection and welded parts.

Removing linear expansion valve

Steps for removing the linear expansion valve, including refrigerant collection and welded parts.

Removing solenoid valve coil <Bypass valve> (SV) and bypass valve

Procedure for removing the bypass valve solenoid coil and the bypass valve.

Removing the high pressure switch (63H)

Instructions for removing the high pressure switch, including refrigerant collection and welding precautions.

Removing the reactor (DCL) and capacitor (CE)

Procedure for removing the reactor and capacitor, noting weight and box removal.

Removing the reactors (ACL1, ACL2, ACL3)

Steps for removing the reactors, noting their weight and the reactor box removal.

Removing the motor for compressor (MC)

Procedure for removing the compressor motor, including refrigerant collection and pipe removal.

Removing the power receiver

Instructions for removing the power receiver, including refrigerant collection and pipe removal.

Parts List (non-RoHS compliant)

Structural Parts

List of structural parts for PUHZ-RP35VHA2 and PUHZ-RP50VHA2 models, with part numbers and diagrams.

RoHS Parts List